Answer:
school day
Step-by-step explanation:
When drawing a chart or a graph:
- x-axis: Independent variable
- y-axis: Dependent variable
The two given variables are:
- number of students who wear blue shirts
- days of the week
Therefore, in this scenario the <u>independent variable</u> is the <u>school day</u> and the <u>dependent variable</u> is the <u>number of students</u> since the former effects the latter.
So the data on the horizontal axis (x-axis) is: school day
